<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
</head>
<body>

<script type="text/javascript">
/*
	var num=10;
	var count=20;
	var total=num +count;
	console.log(total);
*/

/*
	console.log(true+true);
	console.log(1+true);

	console.log("12"+3);
	console.log("12"-3);
*/

console.log(3+5+"7");
</script>

</body>
</html>